This paper studies the life cycle of supply chain disruption risk conduction process, elaborates the small world network research methods and analyzes the small world network features of supply chain disruption risk conduction process; based on the statistical parameters of the network characteristic path length, clustering coefficient, degree of vertices and knowledge exchange frequency analysis, the conclusion is made that the statistical parameters of the small world network is different in different stages of supply chain disruption risk conduction process. MATLAB software is adopted for the numerical simulation and analysis and verification of the correctness of the statistical parameter analysis. Finally, some valuable suggestions are given.